Hi Antoni,
This problem was fixed in 2.24/05 (26 May 2000).
Move to a more recent version.
Rene Brun
On Wed, 17 Jan 2001, Antoni Munar wrote:
>
>
> I am using ROOT version 2.24/04 on IRIX at CDF
>
> When I fit a TGraph with a polinomial function of grade 1
> I have problems retreiving the fitting parameters.
>
> I do the follow:
>
> TGraph *emGr[24];
> TGraph *hadGr[24];
> ..................
>
> for(k1=0.................
>
> emGr[k1]= new TGraph(nentries,xetmp,yetmp);
> hadGr[k1]= new TGraph(nentries,xhadtmp,yhadtmp);
> //xetmp and yetmp are arrays
>
> emGr[k1]->Fit("pol1","Q","");
> hadGr[k1]->Fit("pol1","Q","");
>
> emf[k1] = emGr[k1]->GetFunction("pol1");
> if(emf[k1]!=0)
> printf("p1: %f\n",emf[k1]->GetParameter(1));
>
> my problem is that the pointer returned by GetFunction is always 0...
>
> Any suggestion...
>
> Thanks very much
>
> **************************************************************
> * Antoni Munar Ara munar@fnal.gov *
> * *
> * INFN Sezione di Pisa *
> * Fermi National Laboratory Phone: (630)840-8426 *
> * P.O. Box 500, MS 223 *
> * Batavia, IL 60510 *
> * U.S.A. *
> **************************************************************
>
This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:33 MET